front side frames in a pair provided at a front portion of a vehicle, the front side frames extending in a vehicle front-rear direction of the vehicle;

sub-frames in a pair provided on a vehicle lower side of the front side frames, the sub-frames extending in the vehicle front-rear direction;

lower arms constituting a suspension bridging between front wheels of the vehicle, the lower arms being coupled to the sub-frames respectively; and

action members each provided with a fitting portion at a vehicle-rear-side end, the fitting portion being fitted to a corresponding one of the sub-frames, the action members each extending from the fitting portion toward an inside of a vehicle front portion of the vehicle,

wherein each of the sub-frames is provided with a first coupling portion and a second coupling portion that rotatably fix a corresponding one of the lower arms; an action-member fixation portion that is provided between the first coupling portion and the second coupling portion and that rotatably fixes a corresponding one of the action members on a vehicle upper side of each of the sub-frames; and a recess that is fitted to the corresponding one of the action members, and

wherein the fitting portion of each of the action members is fitted to the recess of the corresponding one of the sub-frames, and each of the action members is fixed at the action-member fixation portion and the second coupling portion to the corresponding one of the sub-frames and is fixed at the second coupling portion to the corresponding one of the sub-frames by being fastened together with the corresponding one of the lower arms.